Hydraulic valve.



H. WOODS; UECD. A. woons, ADMINISTRATRIX.

HYDRAULIC VALVE,

APPLIUATION FILED JANJB, 1918- Patented Aug. 4, 1914.

2 8HEETS-SHEET 1.

mvcm-on m'rNEssEs I 14 JMQYLZM fiat composed horizontal passages B and C ,sitc sides ofn vertical plane.

UllTE.

HARRY VJ GODS, SF

STEUIQENVILL'E, 01-110;

ALLIE WOODSADMINISTRATBIX OF SAID HARRY "WOODS, lit-K3151AS111).

H YDRAU LIC VALV I Specification of Letters Patent.

Patented Aug. 4, 1914.

Application filed January 18, 1913. Serial No. 742,.

To all If/10777. it may concern:

be it known that l, Hnnur "Worms, a eitizen ot' the United States, residing at Steu- "hen ville, in the county of Jefferson and State of Ohio, have for controllino' h drnulic motors such as r] J a motors for pressingor bailing, opening, and closing! furnace doors, reciprocating drawrim-tins in front oi Welding furneces,'"and the like g; Z

The object of my invention to provide a hydraulic valve having but fewparts which are arrangedand'constructed to receive but little Wear and. to require but few replacements of parts and then. only after rang use. 7

l Another object is to rovide controlling valve {which may he easi y nnscatcd against the pressure of thc'motor fluid irrespective of the value of the pressure tending to hold them on their seats.

7 Another object is to improve the manu ally-operated means for controlling the valves proper.

Other objects will appear hereinafter. Referring to the accompanying drawings, .l 'ip ure 1 is a. horizontal longitudinal section of a hydraulic valve embed inc; my invention, the section being taken on the line 'I- l', Fig. 9.. Figs. 2 and 3 are vertical longi sections on the lines II-II,. and Fig. 1. Fig. 4- is line IY---IV Fig. 1

tudinal Ill-ill respectively, .1, cross-section on the Fig. 5 is a cross-section on the line V-V, Fig. 3. Fig. 6 is a cross-section on the line Vlvl, 2. Fig. 7 is a section on the line VIL VII, Fig. 1. 8 is an end view in combination with a hydraulic motor. On the drawings, A represents a casing, of the horizontal member A and the upwardly projecting end members A and A. I i r In the IlTlQll'lbBl A there are two parallel lying on oppo- One end of the passage. B is connected by the ,pipe l to one end of the hydraulic cylinder-ii; and the corresporuliug end of the passage C is connected hy the pipe 1') to the otherend of the evlinder E, having between its ends the. iston G which actnates the piston rod G; The members A, and A are provided with the bores or openings B, 13 G, and C, parallel. with one another and with the passages B and C. The openings B and B lie directly over the passage B, to which they are connected at one end by the passage 15" and at the other end by the passage B", the upper end of the latter passage being enlarged so to form an annular passage encircling, the opening B.

he ends of the opening B are provided with the screw plug II and the hos-hing H, 'their opposingor inner ends leaving botwcen them a space B into which the pus: sage B opens. Similarly a space C is provided between the plug 1 and the bushing I in the opening (1'. i Q In the space B is the J employing the inner end of the bushing. H as a seat. The stem J of the valve re oiprocates in a central bore in the bushing. The bushing H is provided with a series of radiul passages H extending from its central here to its periphery where they C0111- munitate with the passage B in the mem- ,ber A}, which passage 13 surrounds the lhushing H.

In the space 0 is the reciprocatory valve ,K having its seat against the inner end of ,the bushing I. The valve K has the stem K which works in the central bore in the ,hushing I, provided with the radial pas- ,siiges I communicating: with the central bore and the passage C surromuling the bushing. The passages 13 and O communi' cate with each other at their adjacent sides and with the common passage or waste outlet BC.

The valve stems J and K have their diameters reduced from their connections with the valves to a distance beyond the passages B and C at least equal to the displacement of the valves from their seats, so that water or other controlled fluid may pass between the space B andthc passage B; and between ,the space O and the passage C.

The ends of the opening B are provided with the screw plug L and the bushing L,

" their opposing; or inner ends leaving be tween them a space M, in which the reciprocatory \l ve. N works. The stem N of the valve sides in the. central bore inthe bushing L, which is provided with the radial passages L leading" from the cen;

stral bore to the .ennular portion of the reciprouitory valve sages 1 leading' from the central bore to the annular portion of the passage C. The valve Q seats against the inner end of the. bushing P.

The stems N and Q/have their diameters reduced from the valves N and Q to a distance beyond the passages L and P at least equal to the displacement of the valves from their seats.

Each of the valves J, K, N, Q is provided with a. washer or packing R, composed of leather or other suitable material .and adapted to make the valves form watertight connections with their seats.

Each of the bushings H, I, L, P, is provided with av gland S around its corresponding valve stem to make the packing T water-tight around the said stem.

Each of the plugs H, I, L, P, has a central bore with the inner end reduced in diameter. This central bore contains a packing U having inner end in the contracted portion of the bore and its outer larger end in the larger portion thereof. The outer end of each valve has a pressure reducing projection V extending through the corresponding packing U, each of which is held in place by a screw plug W, acting also as a gland onthe said packing to make it fit the projection V water-tight. Each plug has a recess X to receive the projection V of the corresponding valve.

The passages M and 0 open into a common passage B (Fig. 6) which communicates with the pressure inlet B Z represents a rock-shaft lying trans versely of the casing and between the valve stems J and K on one side and the valves N and Q, on the other. The shaft Z is monntedin bearing boxes A and operated the cams.

by the lever or handle Z. The shaft Z carries two cams Z and Z, the former bein be tween the valve stems J and N, ant the ,latter between the valve stems K and Q. The sides of the cam Z diverge downwardly or toward themcmber A and the sides of the camZ diverge upwardly or away from the member A. The ends of the valve-stems next to the cam are beveledso that, when the handle Z is vertical or in its central position (Fig. 3), the said ends will be parallel with the adjacent sides of \Vhen the handle is in its central position all four valves 'are free to close without obstruction from the cams.

If the parts be as shown in Fig. 3 and let B, it will be confined in the passage B and the spaces M and O, and if the valves IN and Qare open, the water will close them on their seats, and no water can pass to the hydraulic cylinder E. If thehandle Z be now moved to the position shown on Figs; 1 and 2, the cam Z will unseat .the valve N, and the cam Z will unseat the valve K '(Fig. 1), whereupon the water will flow from the inlet B through the passage 13, the space M, around the reduced portion of the valve-stem N; through the passages B and B, and the pipe F into .the right-hand end of the cylinder E. The pressure of the water against the piston G will force the piston to the left, causing the piston rod G to transmit power in a well-known manner. If new the handle be moved to acorresponding position on the other side of its central position, the valve stems K and N will be freed from engagement with the ca-ms Z and Z, and the valve stems J and Q will be operated by the cams Z and Z to unseat the-valves J and Q. The pressure of the Water will close the valve N and the water will flow from the inlet B through the passage B around the reduced portion of the valve stem Q, and through the passage P (3* and C and the pipe 1) to the cylinder E. The piston G will be forced to the right causing water forced into the cylinder b the previous operation to flow back throng the pipe F into the passage B, from which it escapes through the waste passage BC by 'wav of the space B, the space around the reduced portion of the valve stem J and the passages H andB". The pressure of the water in the spaces C and M will close the valves K and N as soon as the cams have moved far enough to permit them to do so. I If the handle Zbe again moved to the osition shown on Figs. 1 and 2, the water .rom

' the inlet B will flow as hereinbefore described and the valves J and Q being freed from the cams will be closed by the pressure of the water in the spaces 13 and 0. At the same time that the piston is being forced to the left, the piston is driving the water in front of it out through the waste outlet BC by way of the pipe D, the pas sage C the space around the valve'stem-Ki, and the passages I and 0. The operation described may be repeated as desired and the operation may be stopped at any selected place by moving the handle Z to its central position, whereupon the two open valves will be closed by the excess of pressure on their outer ends, and the already closed valves will remain closed.

The diameter of the extensions-V will varywith' the increase in the size of the valves to; which they are attached or with the incrcasebfthe pressure of -the motor lluid. The erctensions Y are for the purpose of lessening the pressure against the not in contact with the water acting on the outer ends of the'valves, the seating pressure against the'valves is reduced in the ratio of the cross sectional areas of the extension and the valve.

When the piston of the hydraulic cylinde is to be operated in only one direction, only one side or lateral half of my double or twin valve need be made or used.

I claim 1. In a hydraulic motor controller, a casing having a base member and a lateral nuanber on each end of the base member, an inlet chamber and an exhaust chamber in the base member, a pair of passages in the base member, a separate valve in one lateral member between each passage in the base and the exhaust chamber, a valve between each passage in the base and the inlet chamber, and means for opening the inlet valve to one passage in the base and the exhaust valve from the other passage in the base.

2. Ina hydraulic motor controller, a casing having a base member and a lateral member on each end of the base member, an inlet chamber and an exhaust chamber in the base member, a pair of passages in the base member, a separate valve in one lateral member between each passage in the base and the exhaust chamber, a valve between each passage in the base and the inlet chamber, opposing valve stems for the said valves extending in the space between the lateral members, and a pair of cams arranged between the ends of the opposing valve stems.

3. In a hydraulic motor controller, a casing having a base member and a lateral member on each end of the base member, an inlet chamber and an exhaust chamber in the base member, a pair of passages in the base member, a separate valve in one lateral member between each passage in the base and the exhaust chamber, a valve between each passage in the base and the inlet chamber, opposing valve stems for the said valves extending in the space between the lateral members, anda pair of oems arranged between the ends of the opposing valve stems, the said cams being shaped and arranged to permit all the valves to be seated simultaneously.

Signed at Steubenville, Ohio, this 16th day of January, 1913.

' HARRY WOODS.

Witnesses:

- AGNES D. DONVAN,

HUGH W. PATTERSON. 

